file_reader.cpp

#include <iostream>
#include <fstream>
#include <sstream>
#include <string>
#include <stdexcept>
#include <iterator>

class FileReader
{
public:
    FileReader(std::string fn): ifs_{fn}
    {
        if(!ifs_.good())
            throw std::runtime_error{"can not open file"};
    }

    bool is_end() const
    {
        return ifs_.eof();
    }

    std::string read()
    {
        std::string line;
        std::getline(ifs_, line);
        return line;
    }

private:
    std::ifstream ifs_;
};


int main()
{
    for(FileReader file{"simulation1.txt"}; ! file.is_end(); )
    {
        std::string line = file.read();
        if(line[0] == '#')  continue;
        std::stringstream ss{line};
        for(std::string token; std::getline(ss, token, ' '); )
        {
            if(token[0] == '\r') continue;
            std::cout << token << std::endl;
        }
    }
}